NY -- Standard&Poor's CreditWire 5/27/98 – Standard&Poor's today assigned its triple-`B'-plus rating to New York City's G.O. debt and places the ratings on CreditWatch with positive implications as follows: -- $150 million G.O. bonds fiscal 1998 series I due May 15, 2028, -- $771.77 million G.O. bonds fiscal 1998 series J due Aug. 1, 2025, and -- $92.29 million G.O. bonds taxable fiscal 1998 series K dated June 24, 1998 due Aug. 1, 1999-2002. The series I bonds are expected to sell May 28, 1998 and series J and K are scheduled to sell June 9, 1998. Standard&Poor's triple-`B'-plus and triple-`B'-plus-r ratings on the city's approximately $27 billion of general obligation debt remain on